Question 1 The dipeptide below is formed by linking the amino acid isoleucine via amide bond to the aminoacid cysteine.OHLieH₂NIZSHa) Label the alpha position of cysteine and the beta position of isoleucineb)In the box provided, draw the structure of the dipeptide in the stomach (pH = 2)c) Is there a pH where the dipeptide will exist as it is drawn above?d) Why or why not?-1-

Amino acids are biomolecules that have an amino group, a carboxyl group and a side chain all linked…

Answered: Question 1 The dipeptide below is…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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The molecule that condensed with a phosphate group to form the head group of the lipid shown in the first image (picture 6) is choline, an essential component of many cellular molecules. (a) Draw the structure of choline and explain why it needs a transport protein in order to enter cells. (b) Cells must transport choline from outside the cell (where it is relatively rare) to the inside of the cell (where it is relatively abundant). The diagram below represents a cell with a choline transporter (labeled T). Draw a solid arrow through the transporter to show the direction in which choline travels (into or out of the cell). (c) Is T an active or passive transport protein for choline? (d) For every choline molecule that moves through T, a sodium ion moves through the same transport protein at the same time. The sodium ion moves down its gradient. Add a dashed arrow to the diagram in part (b) to show the direction of movement of sodium. (e)…
"Potassium Bromate (KBr03) is added to flour as a softener that strengthens the texture of bread. It can do this by forming disulfide bonds between two cysteine amino acids in a reaction similar to the chemical equation given below. The function of KBr03 is to remove the 2 electrons needed to form the disulfide bond as shown in the figure below. Each of the cysteine amino acids will be in a protein chain, so the reaction binds the two chains together, giving the dough cohesion. However, potassium bromate is a proven carcinogen and is only allowed in foods in the United States because bakers will add the right amount and correct It has been assumed to meet the temperature and cooking time conditions. " KBRO, + C,H¸NO,SH → KBr + H,O+C,H„N,O,S, Balance the reaction of potassium bromate (KBr03) with the cysteine molecule (C3H6 NO2 SH) by converting it into the reduced step matrix using the additive matrix method. (Kis the symbol of potassium in the question) (Homogeneous linear equation…

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